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**Change to protocol for von Willebrand Multimer**

​As of January 1, 2017 a change to the protocol for von Willebrand Multimer requests has taken place.  Our reference testing facility, University Health Network, will screen all multimer requests with a von Willebrand disease (VWD) screening panel which includes VWD antigen, VWD activity and FVIII assay. The multimer assay will only be done on the samples with abnormal VWD screens.

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